“What does (im)moderate use have to do with “running things”? I”
Let’s take for example a supervisor at Exxon. He has a martini with his lunch, two glasses of wine with his dinner, and on the weekend he has three beers while watching a football game.
His sanity is untouched. He is in his right mind at all times. He does not hallucinate. He does not get paranoid. Etc. He is actually benefited from some nutrition and some health benefits from the drinks, unless he is allergic to it or something.
Now let’s have him smoke pot every day at lunch, snort Coke after dinner, and shoot smack on Saturdays.
Is there a difference in his ability to remain sane, to make rational decisions, to interact with people humanely, to stay in touch with reality? Of course there is.
Utterly irrelevant to your claim that the legality of drugs other than alcohol would lead to "junkies, acid freaks and meth heads running things."